fig11
![Solid-state NMR of active sites in TiO<sub>2</sub> photocatalysis: a critical review](https://image.oaes.cc/aee4ec06-4c22-4959-90f1-d08b90ca3a45/cs4012.fig.11.jpg)
Figure 11. HRTEM images of as-prepared TiO2 with (A) 90% and (B) 80% (101) facet, and (C) 75% (001) facet, and (D-F) their corresponding 31P MAS NMR spectra of TMP-adsorbed TiO2. Theoretical models and calculated adsorption energy (Ead) between TMP and Ti5C sites on various TiO2 facets, including (G) (001) facet, (H) (101) facet, and (I) the reconstructed (1 × 4) (001) facet (Ti: light grey; O: red; P: orange; C: grey; H: white). Reproduced with permission from[164]. Copyright 2017, Springer Nature. HRTEM: High-resolution transmission electron microscopy; MAS: magic angle spinning; NMR: nuclear magnetic resonance; TMP: trimethylphosphine.